<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <!-- <meta name="viewport" content="width=device-width, initial-scale=1.0"> -->
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>获取viewport的大小</title>
    
</head>

<body>

    <script>

        console.log("layout viewport的宽度" + document.documentElement.clientWidth);
        console.log("visual viewport的宽度" + window.innerWidth);
    </script>
</body>

</html>